--- title: "Vishnu D (@vishd) | Hashnode" description: "Building data pipelines. Breaking them down for you. Read the latest articles by Vishnu D on Hashnode." url: "https://hashnode.com/@vishd" --- @vishd # Vishnu D @vishd · Bangalore, India · Joined May 2026 Building data pipelines. Breaking them down for you. ### [Spark Architecture Simply Explained](https://thedatatrench.hashnode.dev/spark-architecture-simply-explained?utm_source=hashnode&utm_medium=feed) Driver, executors, stages, tasks -- the full picture 9 min read · [thedatatrench.hashnode.dev](https://thedatatrench.hashnode.dev/spark-architecture-simply-explained?utm_source=hashnode&utm_medium=feed) [May 29](https://hashnode.com/posts/spark-architecture-simply-explained/6a19a21fab3131ee6a21720d) ### [Claude AI Is Only as Good as How You Use It](https://thedatatrench.hashnode.dev/claude-ai-how-to-use?utm_source=hashnode&utm_medium=feed) A practical guide to prompting, Projects, and real-world patterns from a data engineering workflow 10 min read · [thedatatrench.hashnode.dev](https://thedatatrench.hashnode.dev/claude-ai-how-to-use?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/claude-ai-how-to-use/6a112ee71f237623ea6325f7) [May 23](https://hashnode.com/posts/claude-ai-how-to-use/6a112ee71f237623ea6325f7) ### [OLTP vs OLAP: The Difference Every Data Engineer Should Know](https://thedatatrench.hashnode.dev/oltp-vs-olap?utm_source=hashnode&utm_medium=feed) The foundation beneath every data pipeline — and why it matters more than people think 10 min read · [thedatatrench.hashnode.dev](https://thedatatrench.hashnode.dev/oltp-vs-olap?utm_source=hashnode&utm_medium=feed) [May 15](https://hashnode.com/posts/oltp-vs-olap/6a0694c69c794cb653dbf87d) ### [Star Schema vs Snowflake Schema: Why the Real Difference Isn't What You Think](https://thedatatrench.hashnode.dev/star-schema-vs-snowflake-schema?utm_source=hashnode&utm_medium=feed) Real examples, SQL patterns, and a decision framework — because "denormalized vs normalized" isn't enough. 10 min read · [thedatatrench.hashnode.dev](https://thedatatrench.hashnode.dev/star-schema-vs-snowflake-schema?utm_source=hashnode&utm_medium=feed) [May 14](https://hashnode.com/posts/star-schema-vs-snowflake-schema/6a053e69a0c15402779b0277) ### [Claude Code for Data Engineers — What I Actually Use It For](https://thedatatrench.hashnode.dev/claude-code-for-data-engineers?utm_source=hashnode&utm_medium=feed) Eight real use cases from a dbt and Databricks workflow — plus the honest caveat nobody talks about 11 min read · [thedatatrench.hashnode.dev](https://thedatatrench.hashnode.dev/claude-code-for-data-engineers?utm_source=hashnode&utm_medium=feed) [May 9](https://hashnode.com/posts/claude-code-for-data-engineers/69ff577ff239332df4cb65ef)